CN106051189A - Hydrant seal structure with double sealing - Google Patents
Hydrant seal structure with double sealing Download PDFInfo
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- CN106051189A CN106051189A CN201610695342.9A CN201610695342A CN106051189A CN 106051189 A CN106051189 A CN 106051189A CN 201610695342 A CN201610695342 A CN 201610695342A CN 106051189 A CN106051189 A CN 106051189A
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- valve body
- sealing
- pair
- valve disc
- metal valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/46—Attachment of sealing rings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a hydrant seal structure with double sealing, forming a double sealing pair between a metal valve disc and a metal valve body when a hydrant is turned off; the hydrant seal structure is characterized in that the sealing pair includes a combination of more than one rigid sealing pair and more than one soft sealing pair; the rigid sealing pair is formed by direct contact of the metal valve disc and the metal valve body; the soft sealing pair is formed by the metal valve body mating with an elastic seal on the metal valve disc; or the metal valve disc mates with an elastic seal on the metal valve body to form the soft sealing pair. The seal structure of the invention has the advantages of both rigid sealing and soft sealing, has fire tolerance as in a rigid-sealed hydrant and also has good sealing performance as in a soft-sealed hydrant. Legal requirements in International Convention for the Safety of Life at Sea are met, and marine usage requirements are also met.
Description
Technical field
The present invention relates to a kind of fire hydrant sealing structure with dual-seal.
Background technology
Fire is one of main factor affecting safety of ship, and fixing water-based fire protection system is the most basic of boats and ships use
Fire extinguishing means, fire hydrant is requisite equipment in fire-fighting system.The fire hydrant standard the most often used includes: China is peculiar to vessel
Fire hydrant GB GB/T2032, Japanese standard JIS F7334 peculiar to vessel, Chinese vessel industry standard CB/T4032, Germany's fire-fighting mark
Quasi-DIN86211.Wherein, GB/T2032 allows to use the fire hydrant of soft seal form；DIN 86211 also there is soft seal disappear
Anti-stud structure, but non-fire hydrant standard peculiar to vessel；JIS and CB standard all only has the pattern of hard sealing structure." International Maritime human life
Security pact " the 10th article of 2.1.1 of (SOLAS) ii-2 specifies: " heat is prone to the material lost efficacy, unless it has sufficiently guarantor
Protect, fire main pipe and fire hydrant must not be used for." which limits the use aboard ship of the encapsulants such as rubber.
The strictest enforcement of SOLAS pact limits the making of soft seal fire hydrant using rubber to make encapsulant
With.But, use the hard fire hydrant sealed to need higher seal pressure, sealing property is highly susceptible to again the mud in sea water
The impact of the foreign material such as husky, ground metallic sealing section is injured or is susceptible to leakage after corrosion.Although firmly sealing fire hydrant energy
Ensure the fire resistance of fire hydrant, but in using, there is the shortcoming easily leaked.
Based on this, fire hydrant designer generally solves problem from two angles: (1) improves hard sealing metal material property,
Improved structure, prevents foreign material in the accumulation of valve port, it is to avoid sealing surface is injured.(2) " sufficiently protecting " for requirements of convention does
Article, improves the protection to rubber seal by structure, or changes high temperature sealing material.This corrective measure runs into
How a difficult problem is by the effectiveness of fire resistance test proof protection.ISO19921 " boats and ships and marine technical-it is furnished with elastic sealing element
Metal tubes adnexa fire resistance " hose valve is opened when requiring fire resistance test, internal keep circulating water temperature at about 80 DEG C,
But this does not meets fire hydrant state in the case of catching fire.For the water fire fighting system used by freighter and most passenger boat, all use
Dry pipe system, does not has water in piping the most under normal circumstances, can be directly exposed in fire once breaking out of fire fire hydrant, during dry combustion method
Rubber valve disc directly contacts with metal seat valve, and in the case of external skin temperatures 800 DEG C, rubber ring even Graphite pad is likely to become
Shape is even burnt.Dry combustion method test lacks suitable standard at aspects such as baked wheaten cake time, permission amount of leakage.Therefore one is more effectively
Seal structure to be badly in need of being developed, be used for solving the problems referred to above.
Summary of the invention
The hard sealing fire hydrant easy leakage and the soft seal under soiled condition that the present invention is directed to prior art existence disappear
Anti-bolt is weak to the problem burnt, and develops a kind of fire hydrant sealing structure with dual-seal.Concrete technical scheme is as follows:
A kind of fire hydrant sealing structure with dual-seal, when fire hydrant is closed, metal valve disc and metal valve body
Between to form dual-seal secondary, it is characterised in that described sealing pair includes: above hard sealing pair and together with more than soft
The combination of sealing pair；
Described hard sealing pair is directly contacted with metal valve body by metal valve disc and forms hard sealing pair；
Described soft seal pair is provided with elastic sealing element by metal valve disc and cooperatively forms soft seal pair with metal valve body；Or gold
Genus valve body is provided with elastic sealing element and cooperatively forms soft seal pair with metal valve disc.
Described hard sealing pair and soft seal pair are arranged on the flat contact surface of metal valve disc and metal valve body composition.
Another kind of scheme is to be provided with conical contact face, hard sealing pair or soft close between described metal valve disc and metal valve body
Envelope pair is arranged on conical contact face.There is following two form:
1) described metal valve disc has valve disc pyramidal structure, and the bottom diameter of described valve disc pyramidal structure is less than upper straight
Footpath, corresponding metal valve body is provided with back cut diameter and accommodates chamber more than the valve body taper of lower port diameter, for tying with valve disc taper
Structure matches, and the root of valve disc pyramidal structure is provided with valve disc contact plane, and the corresponding valve body taper constituting metal valve body accommodates chamber
The top of cavity wall be provided with the valve body contact plane matched with valve disc contact plane.
2) described metal valve body has valve body pyramidal structure, and the upper end diameter of described valve body pyramidal structure is less than lower straight
Footpath, corresponding metal valve disc is provided with lower port diameter and accommodates chamber more than the valve disc taper of back cut diameter, for tying with valve body taper
Structure matches, and the root of valve body pyramidal structure is provided with valve body contact plane, and the corresponding valve disc taper constituting metal valve disc accommodates chamber
The bottom of cavity wall be provided with the valve disc contact plane matched with valve body contact plane.
Hard sealing pair, corresponding metal valve disc or metal valve is formed at described valve disc contact plane and valve body contact flat face
Body is provided with elastic sealing element, and it is secondary that the conical contact face between metal valve disc and metal valve body constitutes soft seal.
Described valve disc contact plane or valve body contact plane are provided with elastic sealing element, valve disc contact plane and valve body contact
Forming soft seal at flat face secondary, the conical contact face between corresponding metal valve disc and metal valve body constitutes hard sealing pair.
Described elastic sealing element is made up of elaxtic seal.
A kind of fire hydrant sealing pair with dual-seal, when fire hydrant is closed, shape between metal valve disc and valve seat
Become sealing pair, it is characterised in that described sealing pair includes: together above hard sealing pair and together with above soft seal pair；
Described hard sealing pair is directly contacted with valve seat by metal valve disc and forms hard sealing pair；
Described soft seal pair is provided with elastic sealing element by metal valve disc and cooperatively forms soft seal pair with valve seat；Or on valve seat
It is provided with elastic sealing element and cooperatively forms soft seal pair with metal valve disc.
Of the present invention have dual-seal pair, has the following advantages and beneficial effect:
(1) ensure that the fire resistance of fire hydrant, it is ensured that the integrity of fire-fighting system and safety in fire.
(2) reduce the leakage in routine use, prevent deck from corroding, reduce daily maintenance workload.
(3) conformance with standard requirement, exchanges highly versatile.
(4) compact conformation, does not increase fire hydrant installation dimension.
Accompanying drawing explanation
Fig. 1 is the structural representation of the dual-seal fire hydrant using sealing gasket；
Fig. 2 is the structural representation of the dual-seal fire hydrant using O-ring seal；
Fig. 3 is the structural representation of embodiment 1；
Fig. 4 is the structural representation of embodiment 2；
Fig. 5 is the structural representation of embodiment 3；
Fig. 6 is the structural representation of embodiment 4；
Fig. 7 is the structural representation of embodiment 5；
Fig. 8 is the structural representation of embodiment 6；
Fig. 9 is the structural representation of embodiment 7；
Figure 10 is the structural representation of embodiment 8.
Detailed description of the invention
The sealing structure with dual-seal of a kind of fire hydrant as shown in Figures 1 to 10, when fire hydrant is closed, gold
Belonging to and form sealing pair 8 between valve disc and metal valve body, described sealing pair 8 includes: above hard sealing pair 801 with together with
On soft seal pair 802；Described hard sealing pair 801 is directly contacted with metal valve body 7 by metal valve disc 6 and forms hard sealing pair；Institute
State soft seal pair 802 to be provided with elastic sealing element 9 by metal valve disc 6 to cooperatively form soft seal with metal valve body 7 secondary, or metal valve
Body 7 is provided with elastic sealing element 9 and cooperatively forms soft seal pair with metal valve disc 6.Wherein hard sealing pair and soft seal pair are arranged on
On the flat contact surface that metal valve disc and metal valve body are constituted.Conical contact also can be provided with between metal valve disc and metal valve body
Face, hard sealing pair or soft seal pair are arranged on conical contact face.Described elastic sealing element 9 is made up of elaxtic seal.I.e.
Can be rubber, plastic or other material composition, pad or the sealing ring of various cross sectional shape can be used.This sealing structure can be used for
Through-type fire hydrant as depicted in figs. 1 and 2, similarly also apply be applicable to perpendicular type fire hydrant.
In normal operation, the closing torque on valve handle is changed into valve rod pressure and is respectively acting on two by valve rod
On road sealing pair, at this moment rely primarily on soft seal pair and ensure good sealing property, even if impurities in water is more in sea also can be reliable
Ground seals.When a fire, if flame high temperature causes elastic sealing element to damage, then valve rod pressure shift completely concentrate on the closeest
On seal structure, remain to the standard that reaches and firmly seal the level of security that fire hydrant is same.The present invention rely on hard sealing ensure fire-fighting peace
Entirely, soft sealing material is only used for improving sealing property, belongs to Redundancy Design, meets SOLAS requirements of convention.The present invention can be from structure
Upper guarantee has the fire resistance being not less than in national standard hard sealing fire hydrant.
The design feature being different from traditional soft sealing fire hydrant is, it is close that soft seal fire hydrant relies only on soft sealing material
Envelope, to ensure enough seal pressures.The valve disc of encapsulant both sides is only used for fixing sealing ring and has protective effect.This
Bright enforcement it is crucial that should be able to make two seals can reach must ratio pressure qmf, but less than allowable than pressure q.Sealing ring or sealing gasket exist
Before fire hydrant unsealing, its top exceeds the top of sealing surface, adjusts sealing ring or exceeding of pad highly can change sealing pressure
Power is distributed, and makes sealing pair reach the seal pressure of regulation.The rigidity utilizing soft and hard seal material in design is different, soft by adjusting
Encapsulant decrement, can change the distribution of valve rod pressure, so that two seals pair all reaches design and requires seal pressure.Valve
The moment of torsion of door handwheel is converted into axial compressive force by the screw thread on valve rod, and first acts on soft sealing material.Work as soft seal
When material is compressed to pre-definite proportion pressure, hard sealing pair comes into contact with, owing to hard sealing pair rigidity is far longer than soft seal pair, valve rod
The pressure newly increased acts on hard sealing pair the most completely.Owing to seal pressure has wider scope, above-mentioned design requires to hold
Easily realize.Usually, the hard seal pressure of copper alloy should be not less than 3MPa but less than 80MPa；Rubber sealing should not be little than pressure
In 0.6MPa but less than 5MPa.In embodiment, metal hard-sealing face need to be ground, rubber blanket or cushion rubber thickness 2-6 milli
Rice.
The present invention be embodied as seal structure as follows:
Embodiment 1: as it is shown on figure 3, hard sealing pair 801 and soft seal pair 802 are arranged on metal valve disc 6 and metal valve body 7
On the flat contact surface constituted, and the elastic sealing element 9 constituting soft seal pair 802 is arranged in metal valve body 7.Elastic sealing element
9 use sealing ring, and sealing ring is arranged on inside hard sealing pair 801.When sealing, the inwall of metal valve body 7 is to sealing ring
Between different metal valve disc 6 joint, metal valve body top, i.e. the inwall of metal valve body 7 is to the metal valve body between sealing ring
Top is with having certain gap 704 between metal valve disc 6；Wherein sealing ring is before fire hydrant unsealing, and its top exceeds metal
The top of valve body 7, adjusts exceeding of sealing ring and highly can change seal pressure distribution, make sealing pair 801 and 802 reach regulation
Seal pressure.So can ensure that fire hydrant, in normal temperature environment seal performance, takes into account again the requirement of fire resistance simultaneously.In the present embodiment
Elastic sealing element 9 can also be arranged on metal valve disc 6, there is identical sealing effectiveness.
Embodiment 2: as shown in Figure 4, hard sealing pair 801 and soft seal pair 802 are arranged on metal valve disc 6 and metal valve body 7
On the flat contact surface constituted, the elastic sealing element 9 constituting soft seal pair 802 is arranged on metal valve disc 6.Elastic sealing element 9
Using sealing gasket, sealing gasket is arranged on inside hard sealing pair 801.Wherein sealing gasket is before fire hydrant unsealing, and its top exceeds
The top of metal valve disc 6, adjusts exceeding of sealing gasket and highly can change seal pressure distribution, make sealing pair 801 and 802 reach rule
Fixed seal pressure.
Embodiment 3: as it is shown in figure 5, be provided with conical contact face, soft seal pair 802 between metal valve disc 6 and metal valve body 7
On the conical contact face of being arranged on.Hard sealing pair 801 is arranged on the flat contact surface of metal valve disc 6 and metal valve body 7.Described gold
Belonging to valve disc 6 and have valve disc pyramidal structure 601, the bottom diameter of described valve disc pyramidal structure 601 is less than upper diameter (in back taper
Shape structure), corresponding metal valve body 7 is provided with back cut diameter and accommodates chamber 701 for same valve more than the valve body taper of lower port diameter
Discone structure 601 matches, and the root of valve disc pyramidal structure 601 is provided with valve disc contact plane, corresponding composition metal valve body 7
The top of the cavity wall that valve body taper accommodates chamber 701 is provided with the valve body contact plane matched with valve disc contact plane.Constitute soft close
The elastic sealing element 9 of envelope secondary 802 is arranged on metal valve disc 6.Elastic sealing element 9 uses sealing ring, sealing ring to be arranged on valve disc
On the outer wall of pyramidal structure 601.When sealing, the inwall that sealing ring accommodates chamber 701 with valve body taper is in close contact composition
Soft seal pair 802, valve disc contact plane touches with valve body contact flat face and constitutes hard sealing pair 801.Wherein sealing ring is in fire-fighting
Before bolt unsealing, its top exceeds the top of metal valve body 7, adjusts exceeding of sealing ring and highly can change seal pressure distribution,
Sealing pair 801 and 802 is made to reach the seal pressure of regulation.
Embodiment 4: as shown in Figure 6, is provided with conical contact face, soft seal pair 802 between metal valve disc 6 and metal valve body 7
On the conical contact face of being arranged on.Hard sealing pair 801 is arranged on the flat contact surface of metal valve disc 6 and metal valve body 7.Described gold
Belonging to valve body 7 and have valve body pyramidal structure 703, the upper end diameter of described valve body pyramidal structure 703 is (tapered less than lower diameter
Structure), corresponding metal valve disc 6 is provided with lower port diameter and accommodates chamber 603 for same valve body more than the valve disc taper of back cut diameter
Pyramidal structure matches, and the root of valve body pyramidal structure 703 is provided with valve body contact plane 702, the corresponding valve constituting metal valve disc 6
The bottom of the cavity wall that discone accommodates chamber 603 is provided with the valve disc contact plane 602 matched with valve body contact plane 702.Elastic
Sealing member 9 uses sealing ring, sealing ring to be arranged on the outer wall of valve body pyramidal structure 703.When sealing, the same valve of sealing ring
Discone accommodates the inwall in chamber 603 and is in close contact composition soft seal pair 802, and valve disc contact plane 602 is with valve body contact plane 702
The hard sealing pair 801 of the composition that contacts.
Embodiment 5: as it is shown in fig. 7, hard sealing pair 801 and soft seal pair 802 are arranged on metal valve disc 6 and metal valve body 7
On the flat contact surface constituted, and the elastic sealing element 9 constituting soft seal pair 802 is arranged on metal valve disc 6.Described metal valve
Dish 6 is provided with cannelure 604 with metal valve body 7 touching position, and such metal valve disc 6 and metal valve body 7 are formed for twice and firmly seal
Secondary 801 (sealing pairs more than twice can be further assured that hard sealing effectiveness).Elastic sealing element 9 uses sealing ring, sealing ring to set
Put inside hard sealing pair 801.
Embodiment 6: as shown in Figure 8, is provided with conical contact face, soft seal pair 802 between metal valve disc 6 and metal valve body 7
On the conical contact face of being arranged on.Hard sealing pair 801 is arranged on the flat contact surface of metal valve disc 6 and metal valve body 7.Described gold
Belonging to valve disc 6 and have valve disc pyramidal structure 601, the bottom diameter of described valve disc pyramidal structure 601 is less than upper diameter (in back taper
Shape structure), corresponding metal valve body 7 is provided with back cut diameter and accommodates chamber 701 for same valve more than the valve body taper of lower port diameter
Discone structure 601 matches, and the root of valve disc pyramidal structure 601 is provided with valve disc contact plane 602, corresponding composition metal valve body
The top of the cavity wall that the valve body taper of 7 accommodates chamber 701 is provided with the valve body contact plane 702 matched with valve disc contact plane.Structure
The elastic sealing element 9 becoming soft seal pair 802 is arranged in metal valve body 7.Elastic sealing element 9 uses sealing ring, and sealing ring is arranged
On the inwall that valve body taper accommodates chamber 701.When sealing, sealing ring closely connects with the outer wall of valve disc pyramidal structure 601
Touching and constitute soft seal pair 802, valve disc contact plane 602 contacts with valve body contact plane 702 and constitutes hard sealing pair 801.
Embodiment 7: as it is shown in figure 9, be provided with conical contact face between metal valve disc 6 and metal valve body 7.Hard sealing pair 801
Being arranged on the flat contact surface of metal valve disc 6 and metal valve body 7, soft seal pair 802 is arranged on flat contact surface.Described gold
Belonging to valve disc 6 and have valve disc pyramidal structure 601, the bottom diameter of described valve disc pyramidal structure 601 is less than upper diameter (in back taper
Shape structure), corresponding metal valve body 7 is provided with back cut diameter and accommodates chamber 701 for same valve more than the valve body taper of lower port diameter
Discone structure 601 matches, and the root of valve disc pyramidal structure 601 is provided with valve disc contact plane 602, corresponding composition metal valve body
The top of the cavity wall that the valve body taper of 7 accommodates chamber 701 is provided with the valve body contact plane 702 matched with valve disc contact plane.Bullet
Property sealing member 9 uses sealing ring, sealing ring to be arranged in valve body contact plane 702.When sealing, valve disc contact plane
602 are in close contact composition soft seal pair 802 with sealing ring；The outer wall of valve disc pyramidal structure 601 accommodates chamber 701 with valve body taper
Inwall joint forms hard sealing pair 801.
Embodiment 8: as shown in Figure 10, hard sealing pair 801 and soft seal pair 802 are arranged on metal valve disc 6 and valve seat 10 structure
On the flat contact surface become, and the elastic sealing element 9 constituting soft seal pair 802 is arranged on valve seat 10.Elastic sealing element 9 uses
Sealing ring, sealing ring is arranged on inside hard sealing pair 801.Valve when sealing, between the inwall of valve seat 10 to sealing ring
Seat different metal valve disc 6 joint, top, the i.e. inwall of valve seat 10 to the valve seat top between sealing ring with metal valve disc 6 between
There is certain gap；Wherein sealing ring is before fire hydrant unsealing, and its top exceeds the top of valve seat 10.Described metal valve disc 6
Being provided with cannelure 604 with valve seat 10 touching position, such metal valve disc 6 and valve seat 10 are formed for the hard sealing pair of twice 801.
The sealing structure that this patent is proposed improves the sealing structure of conventional fire hydrant, uses and has hard sealing and soft close
The sealing structure of envelope dual characteristics, had both had the hard fire resistance sealing fire hydrant, had had again the closeest of soft seal fire hydrant
Sealing property.When fire hydrant is closed, by handwheel and valve rod, closing torque is converted to pressure and applies to valve disc, valve disc and valve body
Form sealing pair.Sealing pair in the present invention have employed double sealing structure, and the i.e. first resealing is that metal material is to elastic material
The soft sealing structure of material, the second resealing is the metal material hard sealing structure to metal material, and the two is used in series.Normal work
Making under state, valve rod transmission pressure is respectively acting in two seals pair, relies primarily on soft sealing structure and ensures good sealing
Performance, even if impurities in water is more also can reliably seal in sea.When a fire, flame high temperature causes elastic sealing element to deform,
Valve rod pressure is totally absorbed on hard sealing structure, remains to the standard that reaches and firmly seals the level of security that fire hydrant is same.The present invention
Relying on hard sealing pair to ensure security against fire, meet Safety of Life at Sea Convention requirement, soft seal pair belongs to Redundancy Design.When sending out
During calamity of lighting a fire, although the fire hydrant surrounded by flame will not be used, even if under dry-fire condition, also should ensure that the knot of fire hydrant
Structure integrity, it is to avoid fire water leaks in a large number and causes fire main pipe cannot set up effective pressure, thus affects other fire-fightings
The normal use of bolt.Fire hydrant is under dry-fire condition, and a small amount of leakage is acceptable, even may also operate as to surrounding and from
Body plays cooling protection effect.Under routine use state, crewman can use fire water clamp down, should prevent the race of fire hydrant
Emit water clock.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto,
Any those familiar with the art in the technical scope that the invention discloses, according to technical scheme and
Inventive concept equivalent or change in addition, all should contain within protection scope of the present invention.Sealing provided by the present invention
Structure can be additionally used in has the ship's fire fighting piping valve member of similar fire-resistant and seal request, connection flange, the sealing of adnexa.
Claims (9)
1. fire hydrant is with having the sealing structure of dual-seal, when fire hydrant is closed, metal valve disc and metal valve body it
Between form sealing pair, it is characterised in that described sealing pair includes: together above hard sealing pair and together with above soft seal pair；
Described hard sealing pair is directly contacted with metal valve body by metal valve disc and forms hard sealing pair；
Described soft seal pair is provided with elastic sealing element by metal valve disc and cooperatively forms soft seal pair with metal valve body；Or metal valve
Body is provided with elastic sealing element and cooperatively forms soft seal pair with metal valve disc.
A kind of fire hydrant the most according to claim 1 is with having the sealing structure of dual-seal, it is characterised in that described firmly
Sealing pair and soft seal pair are arranged on the flat contact surface of metal valve disc and metal valve body composition.
A kind of fire hydrant the most according to claim 1 sealing structure with dual-seal, it is characterised in that described gold
It is provided with conical contact face, hard sealing pair or soft seal pair between genus valve disc and metal valve body to be arranged on conical contact face.
A kind of fire hydrant the most according to claim 3 sealing structure with dual-seal, it is characterised in that described gold
Belonging to valve disc and have valve disc pyramidal structure, the bottom diameter of described valve disc pyramidal structure is less than upper diameter, corresponding metal valve
Body is provided with back cut diameter and accommodates chamber more than the valve body taper of lower port diameter, for matching with valve disc pyramidal structure；Valve disc is bored
The root of shape structure is provided with valve disc contact plane, and the top of the cavity wall that the corresponding valve body taper constituting metal valve body accommodates chamber is provided with
The valve body contact plane matched with valve disc contact plane.
A kind of fire hydrant the most according to claim 3 sealing structure with dual-seal, it is characterised in that described gold
Belonging to valve body and have valve body pyramidal structure, the upper end diameter of described valve body pyramidal structure is less than lower diameter, corresponding metal valve
Dish is provided with lower port diameter and accommodates chamber more than the valve disc taper of back cut diameter, for matching with valve body pyramidal structure；Valve body is bored
The root of shape structure is provided with valve body contact plane, and the bottom of the cavity wall that the corresponding valve disc taper constituting metal valve disc accommodates chamber is provided with
The valve disc contact plane matched with valve body contact plane.
6. according to the sealing structure with dual-seal of a kind of fire hydrant described in claim 4 or 5, it is characterised in that described
Forming hard sealing pair at valve disc contact plane and valve body contact flat face, corresponding metal valve disc or metal valve body are provided with elasticity
Sealing member, it is secondary that the conical contact face between metal valve disc and metal valve body constitutes soft seal.
7. according to the sealing structure with dual-seal of a kind of fire hydrant described in claim 4 or 5, it is characterised in that described
Valve disc contact plane or valve body contact plane are provided with shape at elastic sealing element, valve disc contact plane and valve body contact flat face
Becoming soft seal secondary, the conical contact face between corresponding metal valve disc and metal valve body constitutes hard sealing pair.
8. the sealing structure with dual-seal is used according to a kind of fire hydrant described in claim 1 to 5 any claim, its
It is characterised by that described elastic sealing element is made up of elaxtic seal.
9. a fire hydrant sealing structure with dual-seal, when fire hydrant is closed, shape between metal valve disc and valve seat
Become sealing pair, it is characterised in that described sealing pair includes: together above hard sealing pair and together with above soft seal pair；
Described hard sealing pair is directly contacted with valve seat by metal valve disc and forms hard sealing pair；
Described soft seal pair is provided with elastic sealing element by metal valve disc and cooperatively forms soft seal pair with valve seat；Or valve seat is provided with
It is secondary that elastic sealing element cooperatively forms soft seal with metal valve disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610695342.9A CN106051189A (en) | 2016-08-20 | 2016-08-20 | Hydrant seal structure with double sealing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610695342.9A CN106051189A (en) | 2016-08-20 | 2016-08-20 | Hydrant seal structure with double sealing |
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| CN106051189A true CN106051189A (en) | 2016-10-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131452A (en) * | 2019-05-29 | 2019-08-16 | 河南航天液压气动技术有限公司 | A kind of hard sealed relief valve |
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| JP2001519868A (en) * | 1996-05-23 | 2001-10-23 | フィッシャー コントロールズ インターナショナル，インコーポレイテッド | Fluid valve having a soft sheet protected by a secondary hard sheet |
| JP2008014378A (en) * | 2006-07-05 | 2008-01-24 | Kubota Corp | Sealing structure of valve |
| CN101625035A (en) * | 2008-07-08 | 2010-01-13 | 任史勃 | Valve flap of stop valve |
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| CN203500516U (en) * | 2013-09-30 | 2014-03-26 | 北京航天益森风洞工程技术有限公司 | Low temperature sealing valve |
| CN205173494U (en) * | 2015-09-28 | 2016-04-20 | 天津新港船舶重工有限责任公司 | Fire control valve of marine fire hydrant |
| CN205173497U (en) * | 2015-11-09 | 2016-04-20 | 中铁电气化局集团北京建筑工程有限公司 | Double containment fire hydrant |
| CN205173522U (en) * | 2015-12-10 | 2016-04-20 | 自贡飞球特种阀门制造有限公司 | Disk seat can be dismantled by choke valve |
| CN205978525U (en) * | 2016-08-20 | 2017-02-22 | 王艺澄 | Fire hydrant is with seal structure who has double sealing |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131452A (en) * | 2019-05-29 | 2019-08-16 | 河南航天液压气动技术有限公司 | A kind of hard sealed relief valve |
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Application publication date: 20161026 |